Google is your friend here.
arduino pixel effects
shoukd keep you busy.
Find projects that do anything like you are up to
arduino rtc
might also keep you busy.
Dunno about your coding chops skills; you may want to drag out and study some of the basic examples sketches that are available within the IDE.
Inevitable is your need to appreciate and account for some things you might learn up on ahead of time to save yourself a buncha grief
combine arduino sketches
HTH
a7